Default [Q] Microphone Speaker Bottom not Working

Hi guys i find myself having to repair my motorola xt890 just bought used.

Disassembling the phone I realize that someone has already previously tried to fix it because there is a little scorched area.
I realize that the logic board is broken in several places,and perhaps this has caused the breaking of links.

Initial situation

s30.postimg.org/msk2tj5jl/Microfono_motorola_1.jpg

speaker removed

s30.postimg.org/f8qzrhccx/Microfono_motorola_2.jpg

back motherboard

s30.postimg.org/xtf7yjxsh/Microfono_motorola_3.jpg

you think it is possible to connect directly to the source chip? how can I do?